package com.mall.product.exception;

import com.mall.common.exception.BizCodeEnum;
import com.mall.common.utils.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.validation.BindException;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

@ControllerAdvice
@Slf4j
public class GloableException {

    /**
     * 参数校验异常
     */
    @ExceptionHandler(value = MethodArgumentNotValidException.class)
    public R handleValidException(MethodArgumentNotValidException e) {
        log.error("数据校验出现问题{}，异常类型：{}", e.getMessage(), e.getClass());
        BindingResult bindingResult = e.getBindingResult();
        Map<String, String> errorMap = new HashMap<>();
        bindingResult.getFieldErrors().forEach((fieldError) -> {
            errorMap.put(fieldError.getField(), fieldError.getDefaultMessage());
        });
        return R.error(BizCodeEnum.VALID_EXCEPTION.getCode(), BizCodeEnum.VALID_EXCEPTION.getMsg()).put("data", errorMap);
    }

    /**
     * 处理空指针的异常
     */
    @ExceptionHandler(value =NullPointerException.class)
    @ResponseBody
    public R exceptionHandler(NullPointerException exception){
        log.error("发生空指针异常！信息:",exception);
        return R.error(BizCodeEnum.VALID_NULL.getCode(),BizCodeEnum.VALID_NULL.getMsg());
    }

    /**
     * 其他类型异常
     */
    @ExceptionHandler(value = Throwable.class)
    public R handleException(Throwable throwable) {
        log.error("错误：", throwable);
        return R.error(BizCodeEnum.UNKNOWN_EXCEPTION.getCode(), BizCodeEnum.UNKNOWN_EXCEPTION.getMsg());
    }

}
